Process of imparting drying properties to pigments.



UNITED "STATES:

PATENT .OFFICE.

WILLIAM ;N. ,BLAKEMAN, .13., on NEW YORK, N ."Y. f

M, PROCESS OFJMPARTING .DIRYING PROPERTIES T0 PIGIMENTSI."

, SPECIFICATION forming part f Letters was No. 702,173, dated June 10, 1902 Application filed October 31, 1899. Serial No. 735,438. (l l'o specimens.) t I To all lwhoin it mag concern;

Beit knOWn'thatLWILLIA N. B A nnAN Jr., of the borough'of Manhattan, in the city,

county, and State of New York, have'inventeda new and usefulProcess of'f I mparti'ngDrying Properties to Pigments, which invention is fully set forth'in the following specification.

' paintsproduced will exhibit quicker drying properties than the mixture now in use.

Heretofore in the, manufaeture of paints the general practice has been to grind th-e pigment in an oil vehicle and add to the paint thus formed, either atthe time of grinding'or subsequently, such driers f or dryingagents as it might be'd'e'siredjto use I I have discovered that if in'steadof adding driers'at the time of or subsequent tovgrind-f the igment, l a 'q ti i i r r l b first incorporated with the pigment and the pigment then ground in the usual oil vehicle a paint will be produced which will exhibit quicker drying properties and be more satis factory in every way. r r

My invention" therefore consists in incor p 'at n e x rierwith m n before the pigment is ground in oil, and I carry out this process by, first, attenuating the drier in a volatile vehicle or solvent; second, incorporating this solution with the pigment, and, third, evaporating the solvent or liquid portion thereof.

The term drier as usedherein is intended to include all substances of animal or vegetable origin which will absorb oxygen and pass from a lower to a higher state of oxidation and transmit or carry their oxygen to oxidizable matter with which they may come in contact, and the termalso includes all me tallic or mineral substances which carry oxygen in combination and will yield a portion of such oxygen to any oxidizable matter with which said substance may be incorporated.

. Examples of driers are the drying-oils, the

turpentines, the resin acids, the acid resins,

of manganese (ametallic salt) andattenuate per cent. iri'one hundred parts of water; This solution I thoroughly incorporate with one 'it by dissolving one-fourth to one-half of one hundred parts of pigmentand then evaporate the water before the pigment is, ground in oil. Any pigment sotreatedw'ill be found when ground in oil to have the drying efieot greatly accelerated.

As showing the improvedresults obtained by my processof treating apigment with a drier, instead of adding the drier to the oil Y or paint in the usual manner the following experiments which I havemade maybe referred to: A mixture of linseed-oiLand two hundredpercent of white'leadywiththe usual amount of commercial drier '(turpeng tine-japanladdedto the mixture in .theusual cent. of white lead, the lead pigment being first treated by my processwith one-fifthof one per cent; of manganese acetate, under similar climatic conditionsidried in five hours, thus effecting a saving in timeof one hour and a half over the previous, mixture.) A mixture of linseed-oil and two hundred per cent. of

wl a fih ioi being p evi usly treat d in.

the usual way with one-fifth of onepercent. of

manganese acetate, dried in five'and three.-

ing properties equal 'to'lead and linseed, and

will also be found when treated with certain driers (manganese, for example) to possess great body or spreading power and be equal to double its quantity of Dutch-process lead.

Certain pigments, among them zinc-white, treated with a drier by my process and then ground in a non-drying oil, such as cottonseed oil, will produce a remarkable efiect of imparting drying properties to the non-drying oil, as described in my application for patent Ibo . 7 way, dried in six and one-half hours, whereas ,7 1 a mixture of linseed-oil and two hundred per filed January 2, 1900, Serial No. 59, and a paint compound so formed will, although made with a non-drying oil, dry and harden in a perfectly satisfactory manner.

The selection of a volatile vehicle or solvent for attenuating the drier used can be made by any one skilled in this branch of chemisty. Water, the alcohols, spirits, ethers, spirit of turpentine, and the naphtha group of paraffins are all available for use.

If it be desired to incorporate with the pig ment any of the commercial liquid driers known as japans and the like, the commercial drier selected, if it be a turpentine drier may be attenuated with one of the naphtha group of paraffins and then incorporated with the pigment and the naphtha then evaporated and recovered through a condenser. If a spirit drier be selected, it may be attenuated with alcohol, then incorporated with the pigment, and the alcohol then evaporated.

.The percentage of drier to pigment may be regulated as practice shall dictate. be applied whenever found advisable.

Zinc-white, white lead, or any other pigment may be treated by my process.

In my application No. 734,698, filed October 25, 1899, I have described a process in which a drier and a separate body-giving agent are combined with a pigment. In the process herein described, however, no separate body-giving agent is used in addition to the drier.

Having thus fully described myinvention, I claim- 1. The process herein described of imparting quicker drying properties to oil pigments, which consists in first attenuating an oxidizing-drier in a volatile vehicle,then incorporating such attenuated drier with a pigment, and then evaporating the vehicle.

2. The process herein described of imparting quicker drying properties to oil pigments, which consists in first attenuating an oxidizing-drier in a volatile vehicle,then incorporating such attenuated drier with a pigment, then evaporating the vehicle, and then grinding the pigment in oil.

3. The process herein described of imparting quicker drying properties to oil pigments, which consists in first attenuating a salt of manganese in a volatile vehicle, then incorporating the same with a pigment, and then evaporating the vehicle.

Heat may 4. The process herein described of imparting quicker drying properties to oil pigment-s, which consists in first attenuating a salt of manganese in a volatile vehicle, then incorporating the same with a pigment, then evaporating the vehicle, and then grinding the pigment in oil.

5. The process herein described of imparting quicker drying properties to zinc-white pigment, which consists in first attenuating an oxidizing-drier in a volatile vehicle, then incorporating such attenuated drier with the zinc-white, and then evaporating the vehicle.

6. The process herein described of imparting quicker drying properties to zinc-white pigment, which consists in first attenuating an oxidizing-d rier in a volatile vehicle, then incorporating such attenuated drier with the zinc-white, then evaporating the vehicle, and then grinding the pigment in oil.

7. The process herein described of imparting quicker drying properties to zinc-white pigment, which consists in first attenuating a salt of manganese in a volatile vehicle, then incorporating the same with the zinc-white, and then evaporating the vehicle.

8. The process herein described of imparting quicker drying properties to zinc-white pigment, which consists in first attenuating a salt of manganese in a volatile vehicle, then incorporating the same with the zincwhite, then evaporating the vehicle, and then grinding the pigment in oil.

9. As a new article of manufacture, a dry pigment having an oxidizing-drier combined therewith, substantially in the proportions specified.

10. As a new article of manufacture, a dry pigment composed of zinc-white and having an oxidizing-drier combined therewith sub stantially in the proportions specified.

11. As a new article of manufacture, a dry pigment having a salt of manganese combined therewith, substantially in the proportions specified.

12. As a new article of manufacture, a dry pigment composed of zinc-white and having a salt of manganese combined therewith before grinding it in oil, substantially in the proportions specified.

WM. N. BLAKEMAN, JR.

\Vitnesses:

FRANCIS P. REILLY, G. A. STIMPsoN, 

